I'm looking for an oil, that my engine will run quietly with, I will not use any oil with, and when I do a lab report I do not want wear metal's. I have used 5W20 Motorcraft synthetic blend, Valvoline Max life 5W20 as well, and when I'm using right now is Kirkland Synthetic 5W20 I would probably go with Valvoline, but that tends to be on the thinner side.